From 76e183bd52b5b008c32c2e07428f9672ab8e1c6f Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Fri, 6 Jan 2017 22:01:23 +0100
Subject: [PATCH] Propagate compile-time size for plain arrays

---
 Eigen/src/Core/ArithmeticSequence.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Eigen/src/Core/ArithmeticSequence.h b/Eigen/src/Core/ArithmeticSequence.h
index bfc586a61..efab2d631 100644
--- a/Eigen/src/Core/ArithmeticSequence.h
+++ b/Eigen/src/Core/ArithmeticSequence.h
@@ -173,6 +173,10 @@ template<typename T, int XprSize> struct get_compile_time_size<T,XprSize,typenam
   enum { value = T::SizeAtCompileTime };
 };
 
+template<typename T, int XprSize, int N> struct get_compile_time_size<const T (&)[N],XprSize> {
+  enum { value = N };
+};
+
 #ifdef EIGEN_HAS_CXX11
 template<typename T, int XprSize, int N> struct get_compile_time_size<std::array<T,N>,XprSize> {
   enum { value = N };